1 files changed, 9 insertions, 0 deletions
diff --git a/tests/test_dbz.py b/tests/test_dbz.py
index 2e5ffe8..3fbd7dc 100644
--- a/tests/test_dbz.py
+++ b/tests/test_dbz.py
@@ -20,6 +20,7 @@ import gzip
 import io
 import json
 import math
+import os
 import tempfile
 import unittest
 from pathlib import Path
@@ -94,3 +95,11 @@ class DbzTest(unittest.TestCase):
                 doc = build(load(duf, Library([DATA / "lib"])), [DATA / "lib"])
         fig = doc["figures"][0]
         self.assertEqual((fig["name"], fig["label"], fig["id"]), ("Alice", "Alice Label", "Fig"))
+
+    def test_write_mode_follows_umask(self):
+        with tempfile.TemporaryDirectory() as d:
+            out = Path(d) / "s.dbz"
+            write(self.doc, out)
+            m = os.umask(0)
+            os.umask(m)
+            self.assertEqual(out.stat().st_mode & 0o777, 0o666 & ~m)